An Aug. 30, 2017 photo Wyoming Game and Fish Department staffer Jim Wasseen pours the remainder of a 5-gallon jug of rotenone into the Dime Lake outlet stream in the Teton Wilderness as part of an effort to rid the Upper Snake River watershed of the non-native fish, which competes with native cutthroat trout. (Ashley Cooper/Jackson Hole News&Guide via AP)
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